What could be causing eyelid asymmetry and how can it be corrected? (photos)

Your crease asymmetry suggests you have a partial central disinsertion of the levator aponeurosis. This is actually going on in both upper eyelids. There is more retraction of pre-aponeurotic fat on the left side. This may have an affect on the position of the upper eyelid margins but that can't be discerned from these photos. Also also have a relative disinsertioin of the lateral canthal angle but again that can't be discerned from this set of photos.